Divide prime numbers into it. Start with 2. Do that four times. Then try 3. Stop.
3 x 3 x 5 x 7 = 315
34 has two prime factors: 2 and 17. It doesn't matter where you write them on the page.
60 30,2 15,2,2 5,3,2,2
The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself. So you do not need to use the division ladder or any other method!
Out of four total factors, 85 has two prime factors: 5 and 17.
ladder method of 144
*)1 7)7 3)21 2)42 The prime factorization of 42 is 2 x 3 x 7.
*)1 5)5 3)15 2)30 The prime factorization of 30 is 2 x 3 x 5.
27 9,3 3,3,3
The prime factorization of 27 is 3 x 3 x 3.
84 42,2 21,2,2 7,3,2,2
5 x 5 = 25
You can do it in your head. Cutting something in half is the same as dividing by a factor of 2. Cut 48 in half. Cut 24 in half. Cut 12 in half. Cut 6 in half. 2 x 2 x 2 x 2 x 3 = 48
*)1 5)5 5)25 5)125 The prime factorization of 125 is 5 x 5 x 5.
3 x 3 x 5 x 7 = 315
34 has two prime factors: 2 and 17. It doesn't matter where you write them on the page.
*)1 5)5 3)15 2)30 The prime factorization of 30 is 2 x 3 x 5.